[clang] [clang-tools-extra] [llvm] [clangd][WIP] Add doxygen parsing using standalone doxygen parser (PR #128591)

[Nathan Ridge via llvm-commits]

HighCommander4 wrote:

@tcottin, thank you for taking the time to pick up this patch! It's clearly a popular feature request.

@kadircet, you were involved with earlier rounds of review on the old patch (https://reviews.llvm.org/D143112) and design discussions in the issue (https://github.com/clangd/clangd/issues/529) -- do you by chance have the cycles to pick up this review?

https://github.com/llvm/llvm-project/pull/128591